Threat is completely fake.
Here is my opinion on this "incident"...
As a former Deck officer with a Western European Navo Navy, I feel the need to remind all of you here about one detail:
The "so-called" threat "We are coming to you, you will explode in 2 minutes"
is broadcasted very clearly. An IMPOSSIBLE thing on open-deck fast moving speedboats. It is therefore clear that this transmission did not come from any Iranian Speedboats.
As the Street of Hormuz is one of the densest navigated parts, it is therefore my professional opinion that the "threat" came from another ship in the vicinity. Incredibly stupid obviously, but a lot of deck officers and crewmembers only use "channel16" (the channel on which the threat was made In my opinion) for stupid remarks. eg. "pilipino monkey, Russian Donkey,etc..." It is therefore plausible that someone overheard the transmissions of the American fleet and decided to "participate".
I must stress again that the broadcast could NOT have come from these Iranian speedboats.
This is also the opinion of all my former collegues in the Belgian Navy, and we've been patrolling in that area before.